<div class="row">
    <div class="col-md-12">
        <div echarts [options]="pieChart" class="nf-chart" #pie></div>
    </div>
</div>
<div class="row">
    <div class="col-md-12">
        <div echarts [options]="barChart" class="nf-chart" #bar></div>
    </div>
</div>
<div class="row">
    <div class="col-md-12">
        <div echarts [options]="lineChart" class="nf-chart" #line></div>
    </div>
</div>